Maryland

As air travellers are aware, airports are marked by a three digit code managed by IATA. This system allows for 17,576 airport codes with all the combinations. Apparently there are 43,982 airports in the world so many apparently do not have commercial service! Some of these three digit codes are “logical” eg SYD for SYDNEY, SEA for Seattle and EDI for Edinburgh. Some are less so EZE for the Buenos Aires suburb that the airport is located in. Toronto Pearson, Canada is YYZ for historical reasons and IAD is Washington-Dulles. I was struck by a post on Boardingarea site: Pointswithacrew about…